Facile flame synthesis and photoluminescent properties of core/shell TiO2/SiO2 nanoparticles

Hu, Yanjie; Li, Chunzhong; Gu, Feng; Zhao, Yin

doi:10.1016/j.jallcom.2006.05.134

Cited by 65 publications

(45 citation statements)

References 22 publications

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“…Compared with the spectrum of Fig. 2a, besides that the stretching vibration of water, the bending vibration peak of chemisorbed O-H bond at 1632 cm -1 [29] and TiO 2 characteristic peaks (Fig. 2b), the characteristic organic bands disappeared for TiO 2 products after calcination, indicating that the complete removal of carbon spheres after calcination.…”

Section: Resultsmentioning

confidence: 88%

Controlled preparation of TiO2 hollow microspheres constructed by crosslinked nanochains with high photocatalytic activity

Song

You

Chen

et al. 2015

J Mater Sci: Mater Electron

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TiO 2 hollow microspheres were successfully synthesized via a controlled hydrolysis reaction, which involved the deposition of an inorganic coating of TiO 2 on the surface of carbon spheres and subsequent removal of carbon spheres by calcination in air. The as-prepared TiO 2 hollow microspheres with an average diameter of 200 nm presented a novel morphology, which was constructed by closely crosslinked TiO 2 nanochains. The morphology of the hollow sphere can be controlled by varying the concentration of TiCl 3 solution. A possible formation mechanism was also proposed. The photo-degradation of rhodamine B (RhB) aqueous solution showed that TiO 2 hollow microspheres exhibited higher photocatalytic activity than that of TiO 2 nanoparticles. The enhanced photocatalytic activity of the as-prepared TiO 2 microspheres here could result from their hollow structures assembled by TiO 2 nanochains and large light-harvesting efficiency.

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Section: Resultsmentioning

confidence: 88%

Controlled preparation of TiO2 hollow microspheres constructed by crosslinked nanochains with high photocatalytic activity

Song

You

Chen

et al. 2015

J Mater Sci: Mater Electron

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“…It would be very interesting to prepare nanomaterials with a novel structure based on the chemical engineering principle and methods. Novel metal oxide nanomaterials, for example, nanoparticles [9][10][11][12], nanotubes [13,14], nanofibers [15], hollow nanostructured microspheres [16,17], and also core-shell nanocomposites [18] have been prepared by gas flame combustion through adjusting the parameters of fluid mixing, flame temperature and the residence time distribution. Figure 1 shows the nanomaterials that have been synthesized by gas flame combustion.…”

Section: Synthesis and Structure Control Of Nanomaterialsmentioning

confidence: 99%

“…Figure 1 shows the nanomaterials that have been synthesized by gas flame combustion. By changing the feeding position, TiO 2 /SiO 2 nanocomposite particles were prepared in premixed flame in the form of dispersing structure of TiO 2 nanocrystals depositing in amorphous SiO 2 matrix and core/shell structure of TiO 2 nanoparticles encapsulated by amorphous SiO 2 [18,19]. Based on the Joule-Thomson throttle cooling and high speed jet entrainment phenomena in the multi-jet reactor, novel γ-Al 2 O 3 hollow nanospheres as well as Al 2 O 3 /TiO 2 and Al 2 O 3 /SiO 2 hollow nanocomposites were successfully prepared; the particle size of these hollow nanostructures was in the range of 100-200 nm and the shell about 10-30 nm [17].…”

Section: Synthesis and Structure Control Of Nanomaterialsmentioning

confidence: 99%

Structure controlling and process scale-up in the fabrication of nanomaterials

2010

Front. Chem. Eng. China

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Nanotechnology is already having a significant commercial impact, and will very certainly have a much greater impact in the future. The research on process engineering and scale-up will be very important for the commercial production and application of nanomaterials, because the properties and structure of nanomaterials are not only determined by the nucleation and growth process, but also strongly affected by the engineering properties, such as the mixing, the heat and mass transfer, and also the distribution of temperature, concentration, etc. This paper will present some research work in our laboratory on the fabrication of nanomaterials. Based on the chemical engineering principle and methods, many kinds of novel nanomaterials can be synthesized and their structure can be easily controlled through adjusting the parameters of the fluid mixing, and the distribution of temperature, residence time and concentration, etc. By using the micro-mixing, heat and mass transfer and reaction control methods, the host-guest nanocomposites have been assembled and assumed as the novel electroanalytical sensing nanobiocomposite materials. Based on the principles of chemical engineering, the manufacturing technologies for magnetic powders, calcium carbonate, and titanium dioxide have been developed for commercial-scale production, and the largest production scale has reached 15 kt/year.

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“…In the field of catalysis, the investigations showed that TS oxide possessed high catalytic activity for epoxidation of olefin [10,11] , isomerization of olefin [12] and selective oxidation of some organic compounds [13] . Moreover, the latest researches showed that the film of TS binary oxide can significantly improve the efficiency of solar cell [14,15] .Up to now, many types of composite structures of TS oxide have been investigated and claimed to have the enhanced photocatalytic activity [16][17][18][19] and catalytic activity [10,11] . However, both photocatalytic mechanism [20][21][22] and catalytic mechanism [23] of TS oxides are not completely understood.…”

mentioning

confidence: 99%